Condenser



,sliresl :tno a". WERNER, or ARLINGTON, Nnwsnasnx, assiettes. 'ro DUBILIER oozunnnsnn connor anion; `ornnw Yoan, inv., A congroRA'rIon or DELAWARE oonnnnsnn I .application filed September '3, 1924. Seria1-No.735,590.

My invention relates to improvements in electrical condenser@ especially condensers so constructed that the capacity thereof can 9 be varied.v *f6 Y An object of the invention is to provide a condenser havingfparts adapted-for .fine and 'f precise adjustment, and .the nature and advantagesiot the invention are set forth 1n` the following specification .taken with the le drawings 1n whichv 'several .forms of con-` densers according to my invention are illustrated.

The disclosure, however, is explanatory only, and l may make changes not necessarily illustrated herein, but embraced within the principle ot the invention, consistent with the breadth of theappended claim. '0n' the drawings,

Figure 1 is a top view of one ornroi a 2o condenser according to my invention; A

Figure 2 is a side view thereof Figures 3, 4 and 5 are side views of other speciio structures containing my invention; and

` Figure 6 is a top plan of modification shown in Figure 5. I

. Un the drawings, the same numerals identity the same parts throughout.

ll-n Figures 1 and 2 l show an element or plate of. conductive material 1 having'a lateral projection 2 at one end supporting 'a hearing 3; and co-operating with said plate or element 1 is another plate or conductive` "element 4, the position of which, with respect to that of the element 1, can'be altered. @ne `of Athese plates will be connected to one terminal of an electric circuit, and the other plate to the opposite terminal of the said circuit, and between the two plates, l dispose ajsheet or plate of insulation or dielectric 5 which shown'asbeing attached to one of the plates such as the plate 1. This `plate 1 hase/pair of hearings 6 on each side adjacent they ends thereof,'and through one ofthese 4 5 bearings passes afshaft 7 carrying at its extremities arms A`8 which are made rigid with said shaft by anysuitahleineanssuch as a key 9. The 4arms 8 project over'the sides of the plate `1 `and insulation 5 and carry journalsl() which engage bea-rings the adjacent end of the plate or element. These y bearings can hejprovidedby cutting and bending portions'v ot the plate 4 in the required manner. rlhe other two bearings' mount a shaft 12 which has laterally projeot- 55 ing arms 13 at its two ends extending over the sides-of the plates 1 and 5, with insulating sleeves 14 on'their lower ends to en age bearings 11 similar to the bearings 6- a ove-mentioned, at the' other end of the plate 4. The' 00 arms 13 may have their extremities bent over .towards each other, and the insulating sleeves 14 can be slipped lipon these bent over ex tremities and inserted into the bearings 11,

so that the conductive element 4 will be elec- 65 trically insulated from the plate 1. .The arms 8 may be of insulation and even it the arms 13 are of metal, the insulation 14 will prevent contact between these arms and the element 4. The journals 10 atthe ends of 7a the arms 8 maybe provided with pin 15- and this pin anchors one end oi a spring 16 which is made fast at its opposite extremity to the shaft 12. This spring tends to draw the arms- 8Yto the right and thus causethe ele- 75 ment 4 to move as close as possible towards thel element 1, the armsS andl arms ,13 acting as links to hold the plate 4 in pfosition parallel to the plate 1 in every adjustment that is given to `this plate 4; and with :the arms 8 of gg' insulation 'andone end of the spring 16 at its point of attachment -with these arms insulated from theplate 4,r thetwo' plates will not he short-circuited by 'this' spring even though the opposite endfof the 'spring is a5 connected directly to the shaft 12. Of course, if desired, the shaft 12 and arms 13 can be made of insulation or ofmetal covered with insulation. l further may use two springs 16, one attached to the pin 15 at one 9o end of the condenser, and the other attached to' the end of one of the arms l-at the other extremity of the condenser, these springs also being joined to studs or pins 17 of insulation or othermaterial suitably insulated Ifrom the plate 1 to assist thefspring 16 in drawing the plate- 4 towards the plate 1. Any other suitable arrangement 'or choice of parts may be adapted for keeping the plates 1 and 4 electrically separated, and insulating from these plates any adjoining operating parts of conductive material, if metal, for example, is used, and thus prevent short-circuiting of the two plates; The springs '16 are not shown in Figure 1, for the saltevof clearness, and of lcourse the springs 1G and 16a may be on both sides of the condenser if desired.

Fixed to the shaft 7 and extending away .from the plate 1 isa rigid arm 13 having a threaded opening to receive the threaded end of an operating rod 19 cariving on its opposite extremity a knob 20. This rod alf-o passes through a smooth opening in the hearing 3 and carries two fixed collars 21 abutting the opposite sides ofthe hein-ing to hold this rod against longitudinal nun'enient. Hence, when this rod turned, the arm 18 can be' drawn towards the bearing 3 turning the shaft 7 and causing the arms 8 to pull upon the spring 1G and, at the same time, move the plate l, the arms S and 13 keeping the plates 1 and 4 parallel. and thus the capacity of the condenser can be varied by the means for altering the relative positions of the plates comprising the rod 19 and parts actuated thereby.

It will be noted while the plate 'It can move towards and from the plate 1, it also has longitudinal movement, at the same time, but in all of its positions, it is parallel to the plate 1 and to itself.

1n Figure 3. a. plate or element of conductive material 4 is associated with another plate or element of conductive material 1a and these two plates are mounted so that they always move directly towards and from each other and remain parallel with each other without any longitudinaldisplacement.v Between these two plates at each end is a wedge block 22 through which passes an operating rod 19 threaded in opposite directions .adjacent its two extremities, so' that when this rod is turned, it willv draw the wedge members 22 togetht-:rl or move them apart. to increase or decrease the space between the plate 1a and il. The two opposite threaded portions of the jrod are indicated at 23 and 24 and, if desired, the condenser may be enclosed in a housing indicated iu broken lines by the numeral 25. An opening in the ends of the housing 'may serve as a bearing for the rod 19. Springs 26 disposed between the plates 1L and 4 in the top and bottom of this casing may normally tend to 'torce the plates towards each other. Further, the top and bottom of the casing 25 may carry on the interior guides 27 to prevent edgewise displacement of the plates. Hence, when the members 22 are drawn together, they force the plates apart and when they a re moved away from. each ot her, the springs 2G move the plates towards ea ch other. The rod is, of course, held against longitudinal movement, as before, because ings to be the two tilted collars thereof engage the inner and outer faces of the easing 25.

In Figure 4, -I show a type of condenser somewhat similar to that of Figure 3, except that the wedge blocks instead 'of having the rod passing directly through the same are provided with extensions 28 with threaded openings for the portions 23 and 21 of the rod, and the plate ln has a projection or block 29 fast to the top of same, this block having a longitudinal opening 30 therein of greater diameter than the rod 19. Sp1-ings 2G may normally tend 'to' move the plate 4t upward and guides 27 be provided as before, to engage the edges of the lower plate: while the plate 1a may be caused to depend upon its own weight to seek the lower level, so that when the knob 2O is moved to withdraw the wedge blocks 22, the plate 4i is moved up a little by the springs 26; while the plate 1n simply sinks because the enlarged opening 30 permits this plate to sink somewhat, without interference from the rod 19. Guides 81 may extend down from the top of the casing 25 and engage the opposite edges of the plate 1. Of course, the rod 19 and the projection 29 will be located about the middle of the width. as well as of the length of the plate la, and will not interfere with any guides 31 depending from the top of the casing into proximity, to the sides or edges of this plate. The fixed collars 21 on the rod 19 abut the opposite ends of the projection 29 and prevent longitudinal' movement of the rod. (lf course, the wedge blocks 22, and,

the casing 25 should be of insulation. ,4

towards and from each other directly and are never displaced longitudinally or laterally, and always remain parallel toeach other.

1n the condenser-of Figures 5 and 6, a plate or element 1 of conductive material has lateral projections 2 on its opposite ends which receive perforated insulating bushings through which 'passes the rod 19 with' fixed collars 21 thereof abutting the bushings or linings to hold the rod against longitudinal movement, while permitting it to rotate. The plate 4 also has lateral projections at its two ends with threaded openengaged by threads on .the rod 19, and one of the projections 33 has an extension 34 to project across the extremity of the adjacent projection 2, and thus be prevented Jfrom turning upon the rod 19 as an axis. The rod 19 may make an angle to the plane of the plates 1 and 4 and'by turning the rod, the distance of4 the plate 4 from the plate 1 is adj usted, while the plate -11 still remains parallel to the plate 1. Thetop ofthe projeetion 2 may be straight and parallel with the fiat under face of the projection 34:, and

In this form of condenser, the plates move.

Ikept out ofcontact therewith by insulation 35, or the lower face of the projection 34 may be covered with a sheet of insulation, like insulation 5. The conductors for uniting the plates 1 and 4 into an electric circuit are diagrammatically indicated at 36 and 37.

Of course, the condensers shown in Figures l, 2, 5`fand 6 can also be enclosed in'a suitable container, or mounted upon a switchboard or panel as desired.

Having described my invention, what I believe to be new and desire to' secure and protect by Letters Patent of the, United States is t A condenser comprising a pairof electrically conductive elements spaced apart,

wedge members to extend between the opposite ends of said elements, said members having extensions, a rod passing through said extensions and having oppositely threaded portions to engage saidv extensions, a projection on one of said plates through which said rod passes, said projection having an opening larger than said rod, and iXed collars on said rod abutting the opposite extremities of the projection, Whereby when the rod is turned, it is held against longitudinal movement and can draw the wedge members together 0r move them apart to control the position of said elements.

Signed at New York in the county of New York and State of New York this 27th day' of August A. H1924.

l LEO J. WERNER. 

